Tuesday, August 26, 2008

What is CO2e

Carbon Dioxide Equivalence (CO2e) is a quantity that describes, for a given Greenhouse Gas, the amount of CO2 that would have the same global warming potential, when measured over a specified timescale (generally, 100 years).

Six examples:

carbon dioxide (CO2) = 1 CO2e

methane (CH4) = 19 CO2e

nitrous oxide(N2O) = 281 CO2e

hydro fluorocarbons (HFCs) = 500-4000 CO2e

perfluorocarbons (PFCs) = 5000-8000 CO2e

sulfur hexafluoride (SF6) = 21,682 CO2e


Anonymous said...

Hey there,
So the co2e is not the same as the carbon footprint? And how can i calculate the co2e for the production of different foods?

Anonymous said...

And how would I calculate the C02e for an entire life of a product? Including manufacturing and disposal back to nature (all the way to ground from where it originated)?

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Anonymous said...

Don't confuse CO2e with GWP. The latter refers to having the same effect over some time-scale, and takes into account how rapidly a given gas dissipates (and is thus relevant for comparing *emissions*). The former is instantaneous, and is thus relevant for comparing *concentrations*.

Nicole Khoo said...

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